Includes: letter from RO Dallmeyer re: account, 1926; letters re: legacies left under Israel Lan-Davis's will, 1927; letter from Harry Carter, director to Lan-Davis re: his wedding, 1915; letter re: the publication of 'Telephotography' by Cyril Lan-Davis, 1934; agreement between Israel Davis and the British Thompson-Houston Company Limited re: the Willesden factory site, 1924 and various obituaries of Israel Lan-Davis, 1927